【1】. Will you please show them around your school reading room?  show sb around带某人参观。句型：Will you please·····？你干···好吗？Will表示意愿，后跟动词原形。

【2】To our surprise, he took the lead/came first in the final exam.。To one’s surprise,令某人吃惊的是，令某人惊讶的是。Take the lead/come first占主要地位， 领先， 带头;in the final exam.在期终考试中；final是形容词，最后的。

【3】These old photos often remind me of what my hometown was like many years ago

.be like像···样的，它的同意短语是look like像···样的。但是二者有细微的差别：“be like”.侧重于“品行，品质”；“look like”侧重于外貌特征。

【4】We are told to guard against any possible danger. 。guard against 避免，预防; 警戒; against是介词。Tell sb to do sth告诉某人做某事；are told to do被告知，是一般现在时被动语态。

【5】This morning I got up early so that/in order that I could watch the raising of the national flag. so that引导目的状语从句．意思是：以致，为了，以便于，可以和in order that ,in order to ,so as to 进行替换．the raising of the national flag升旗仪式。